Kroos, 24, who is under contract at Bayern until 2015, is enjoying his second consecutive season as an integral player for the Treble winners.

The Germany international has featured in all but one of Bayern’s competitive games this campaign, and currently ranks fifth in kicker’s list of the best players in the Bundesliga this term.

Although he is one of few regular starters under coach Pep Guardiola, Kroos has so far not put pen to paper on a new Bayern contract -- despite talks between the player and the club.

In recent months, Bayern have prolonged the deals of David Alaba and Jerome Boateng, who also were on contracts until 2015. Netherlands international Arjen Robben seems set to sign a new contract also.

This leaves Kroos as the last of the quartet to agree new terms. Speaking to kicker, Rummenigge said: “To be honest: Because the talks so far have not led to a new contract.

“It’s always about the money in every agreement. Just that much: We are interested that Toni prolongs his contracted."

The Bayern CEO also elaborated on Mario Mandzukic’s situation at Bayern following the signing of Borussia Dortmund attacker Robert Lewandowski, who will join the club on a free transfer in the summer.

“He [Mario Mandzukic] is under contract until 2016. I have dropped hints to both him and his agent that we would be willing to hold such talks,” Rummenigge replied when asked about a new contract for the Croatia international.

“We are very pleased with him. There were quite a few people who shook their heads in disbelief when we signed him from Wolfsburg. But he was exactly the type of player we wanted. He has brought in those qualities, and we are very pleased.”